I participated in a hackathon by Unibh that lasted 24 hours, the objective was to create an idea where we could act when a dam would burst (Dams in my state, MG-Brazil, are quite common, and we have had several dams broken where cities were devastated) . Our idea was based on alerting residents near the dam. It is possible to identify when a barrier will be breached, so when that would happen, alerts were sent to the residents of that city.

We took second place in this hackathon, and it was a nice experience, but I don't know if I would do it again. Not for 24 hours straight again. 😂